<template>
  <div class="login">
    <el-form ref="loginFormRef" :model="loginForm" :rules="loginRules" class="login-form">
      <h3 class="title">若依后台管理系统</h3>
      <el-form-item prop="username">
        <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
          <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="loginForm.password" type="password" auto-complete="off" placeholder="密码" @keyup.enter="handleLogin">
          <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
        </el-input>
      </el-form-item>
      <el-form-item v-if="captchaEnabled" prop="code">
        <el-input v-model="loginForm.code" auto-complete="off" placeholder="验证码" style="width: 63%" @keyup.enter="handleLogin">
          <template #prefix><svg-icon icon-class="validCode" class="el-input__icon input-icon" /></template>
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" class="login-code-img" @click="getCode" />
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin: 0px 0px 25px 0px">记住密码</el-checkbox>
      <el-form-item style="width: 100%">
        <el-button :loading="loading" size="large" type="primary" style="width: 100%" @click.prevent="handleLogin">
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div v-if="register" style="float: right">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2018-2022 ruoyi.vip All Rights Reserved.</span>
    </div>
  </div>
</template>

<script lang="ts" setup name="LoginPage">
import { ref, watch, onMounted } from "vue";
import { getCodeImg } from "@/api/login";
import type { LoginReq } from "@/api/login";
import Cookies from "js-cookie";
import { encrypt, decrypt } from "@/utils/jsencrypt";
import { useRoute, useRouter } from "vue-router";
import userStore from "@/stores/user";

const router = useRouter();
const route = useRoute();
const store = userStore();

const codeUrl = ref("");
const loginForm = ref<LoginReq>({
  username: "admin",
  password: "admin123",
  rememberMe: false,
  code: "",
  uuid: "",
});
const loginRules = ref({
  username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
  password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }],
});
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 注册开关
const register = ref(false);
const redirect = ref<null | undefined | string>(undefined);

watch(
  route,
  (value) => {
    redirect.value = (value.query && value.query.redirect) as string;
  },
  {
    immediate: true, // 这个属性是重点啦
    // deep: true // 深度监听的参数
  }
);

/**
 * 获取验证码
 */
const getCode = () => {
  getCodeImg().then((res) => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
    if (captchaEnabled.value) {
      codeUrl.value = "data:image/gif;base64," + res.img;
      loginForm.value.uuid = res.uuid;
    }
  });
};
/**
 * 获取Cookie数据
 */
const getCookie = () => {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");

  const tempPwd = password ? decrypt(password) : false;
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: tempPwd || "",
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
  };
};

const loginFormRef = ref();
/**
 * 登录
 */
const handleLogin = () => {
  loginFormRef.value?.validate((valid: boolean) => {
    if (valid) {
      loading.value = true;
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, { expires: 30 });
        const tempPwd = loginForm.value.password ? encrypt(loginForm.value.password) : false;
        Cookies.set("password", tempPwd || "", { expires: 30 });
        Cookies.set("rememberMe", loginForm.value.rememberMe.toString(), {
          expires: 30,
        });
      } else {
        Cookies.remove("username");
        Cookies.remove("password");
        Cookies.remove("rememberMe");
      }
      store
        .Login(loginForm.value)
        .then(() => {
          router.push({ path: redirect.value || "/" });
        })
        .catch(() => {
          loading.value = false;
          if (captchaEnabled.value) {
            getCode();
          }
        });
    }
  });
};

onMounted(() => {
  getCode();
  getCookie();
});
</script>

<style lang="less" scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../../assets/images/login-background.jpg");
  background-size: cover;
}

.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;

  .el-input {
    height: 38px;

    input {
      height: 38px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 38px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 38px;
}
</style>
